US4794380A - Means and method for determining the rotation direction of an oil well pumping unit crank arm - Google Patents
Means and method for determining the rotation direction of an oil well pumping unit crank arm Download PDFInfo
- Publication number
- US4794380A US4794380A US07/078,301 US7830187A US4794380A US 4794380 A US4794380 A US 4794380A US 7830187 A US7830187 A US 7830187A US 4794380 A US4794380 A US 4794380A
- Authority
- US
- United States
- Prior art keywords
- signal
- crank arm
- rotation
- providing
- alarm
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P13/00—Indicating or recording presence, absence, or direction, of movement
- G01P13/02—Indicating direction only, e.g. by weather vane
- G01P13/04—Indicating positive or negative direction of a linear movement or clockwise or anti-clockwise direction of a rotational movement
Definitions
- the present invention relates to oil pumping units in general.
- the apparatus and method of the present invention detects the rotation of an oil well pumping unit crank arm and includes a magnet and two magnetic sensing means spatially related to each other with each magnetic sensor sensing the relative movement between the magnet and the magnetic sensor.
- the magnetic sensor provides a signal corresponding to the relative movement.
- Circuitry connected to both magnetic sensors provides an alarm in accordance with the signals from both magnetic sensors when the rotation of the crank arm is in one direction and does not provide an alarm when the rotation of the crank arm is in the opposite direction.
- FIG. 1 depicts a portion of an oil well pumping unit with elements of apparatus constructed in accordance with the present invention for detecting rotation of the oil pumping unit's crank arm.
- FIG. 2 is a simplified block diagram of the apparatus for detecting the direction of rotation of the oil well pumping unit's crank arm in accordance with the present invention.
- the apparatus of the present invention senses the rotational direction of an oil pumping unit.
- the direction of the prime mover's crank arm rotation is very critical because undue stress will be added to the prime mover if the rotation is incorrect.
- the direction of rotation can be inadvertently changed by changing the power phase sequence during maintenance procedures.
- FIG. 1 With reference to FIG. 1, there is shown a prime mover 3 which includes shaft 8. Shaft 8 is connected to crank arm 11. Elements 3, 8 and 11 are parts of a conventional oil pump.
- a magnet 14 is mounted on shaft 8 while magnetic detectors 17 and 20 are mounted on the housing of 3.
- magnet 14 will first pass magnetic detector 17 causing it to provide a pulse signal to signal conditioner means 24.
- Signal conditioner means 24 provides a pulse to a monostable multi-vibrator 29 which in turn will provide an enabling pulse to register means 23.
- detector 20 provides a pulse to signal conditioner means 34 which in turn provides a pulse to a monostable multi-vibrator 39.
- Monostable multi-vibrator 39 provides an enabling pulse to register means 42.
- Signal conditioner means 24 also provides its pulse to a clock input of register means 42.
- Signal conditioner means 34 also provides its pulse output to a clock input of register means 32.
- monostable multi-vibrator 29 provides an enabling pulse to register means 32 in response to the passage of magnet 14 past magnetic detector 17. Subsequently the pulse provided by signal conditioner means 34, in response to the passage of magnet 14 past magnetic detector 20, provides a pulse which is entered into register means 32. As noted previously, signal conditioner means 24 had provided a pulse to register means 42 but since magnet 14 had not passed magnetic detector 20 it was not entered into register means 42. Thus for clockwise rotational shaft 8 register means 32 will enter a pulse while register means 42 will not.
- register means 42 the register means 42 to be enabled so that a pulse, resulting from the passage of magnet 14 past magnetic detector 17, will be entered into register means 42.
- time signal conditioner means 34 provides a clock pulse means to register means 32 it is not enabled and hence the clock pulse cannot be entered.
- the outputs of register means 32 and 42 are provided to visual display/alarm means 50 where a visual display is provided and an alarm sounded or flashed or both, depending on how the circuitry is arranged as to determine which direction is detrimental.
- visual display and alarm means 50 may also provide a control signal to shut down the pump to prevent damage.
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Lubrication Of Internal Combustion Engines (AREA)
Abstract
Description
Claims (4)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US07/078,301 US4794380A (en) | 1987-07-21 | 1987-07-21 | Means and method for determining the rotation direction of an oil well pumping unit crank arm |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US07/078,301 US4794380A (en) | 1987-07-21 | 1987-07-21 | Means and method for determining the rotation direction of an oil well pumping unit crank arm |
Publications (1)
Publication Number | Publication Date |
---|---|
US4794380A true US4794380A (en) | 1988-12-27 |
Family
ID=22143163
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US07/078,301 Expired - Fee Related US4794380A (en) | 1987-07-21 | 1987-07-21 | Means and method for determining the rotation direction of an oil well pumping unit crank arm |
Country Status (1)
Country | Link |
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US (1) | US4794380A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20090131208A1 (en) * | 2005-04-08 | 2009-05-21 | Hawryluck Chris D | Tensioner With Molded Arm |
US20150320351A1 (en) * | 2014-05-12 | 2015-11-12 | Olivier L. Dehousse | Apparatus to measure the time and ability to process, react to, and synchronize complex visual effects relative to the detection of images in motion (based on the shannon-nyquist signal theory) with complex sounds or sound variations |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3728676A (en) * | 1970-12-02 | 1973-04-17 | Electro Dev Corp | Reverse motion detector |
-
1987
- 1987-07-21 US US07/078,301 patent/US4794380A/en not_active Expired - Fee Related
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3728676A (en) * | 1970-12-02 | 1973-04-17 | Electro Dev Corp | Reverse motion detector |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20090131208A1 (en) * | 2005-04-08 | 2009-05-21 | Hawryluck Chris D | Tensioner With Molded Arm |
US20150320351A1 (en) * | 2014-05-12 | 2015-11-12 | Olivier L. Dehousse | Apparatus to measure the time and ability to process, react to, and synchronize complex visual effects relative to the detection of images in motion (based on the shannon-nyquist signal theory) with complex sounds or sound variations |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: TEXACO INC., 2000 WESTCHESTER AVENUE, WHITE PLAINS Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNORS:DENNISON, JACK A.;SIMPSON, RICHARD S.;REEL/FRAME:004747/0884 Effective date: 19870629 Owner name: TEXACO INC., NEW YORK Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:DENNISON, JACK A.;SIMPSON, RICHARD S.;REEL/FRAME:004747/0884 Effective date: 19870629 |
|
REMI | Maintenance fee reminder mailed | ||
LAPS | Lapse for failure to pay maintenance fees | ||
FP | Lapsed due to failure to pay maintenance fee |
Effective date: 19921227 |
|
STCH | Information on status: patent discontinuation |
Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362 |